Antenna having at least one dipole or an antenna element arrangement which is similar to a dipole

• US 20040201537A1
• Filed: 05/20/2003
• Published: 10/14/2004
• Est. Priority Date: 04/10/2003
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Kathrein-Werke KG. (Kathrein SE)
• Inventors: Stolle, Manfred, Scheyer, Andreas
• Granted Patent: US 6,933,906 B2
• Time in Patent Office: Days
• US Class Current: 343/797
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 19/10 using reflecting surfaces
• CPC Class Codes: H01Q 21/08 the units being spaced along or adjacent to a rectilinear path waveguide fed H01Q21/0037
• CPC Class Codes: H01Q 21/26 Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre

Abstract

An improved antenna having at least one dipole or an antenna element arrangement (11) which is similar to a dipole is distinguished in that the antenna element arrangement (11) is connected capacitively and/or electrically conductively without touching to the reflector (3) or to a reflector (3′) or a substrate (3′) which is non-conductive at least in the area in which the antenna element arrangement (11) is attached or mounted.

Claims

1. Antenna having at least one dipole or an antenna element arrangement which is similar to a dipole, characterized in that the antenna element arrangement is connected capacitively and/or electrically conductively without touching to the reflector or to a reflector or a substrate which is non-conductive at least in the area in which the antenna element arrangement is attached or mounted.

2. Antenna according to claim 1, characterized in that the antenna element arrangement has a balancing device whose cap section is connected to an electrically non-conductive cap with the cap being fixed on the electrically conductive reflector.

3. Antenna according to claim 1, characterized in that a recess is provided in the reflector, in which the cap engages and is anchored, at least partially passing through the recess.

4. Antenna according to claim 1, characterized in that the antenna element arrangement is electrically isolated from the reflector, with the interposition of an electrically non-conductive intermediate layer.

5. Antenna according to claim 1, characterized in that the antenna element arrangement is coated, at least in its cap section, with an electrically non-conductive layer, preferably a dielectric layer.

6. Antenna according to claim 1 characterized in that the reflector is provided with an electrically non-conductive surface layer at least on the face on which the antenna element arrangement is provided, and at least in the area of the attachment section of the antenna element arrangement to the reflector.

7. Antenna according to claim 1, characterized in that, at least in the area of its balancing device, the antenna element arrangement is composed of non-conductive material and is coated with an electrically conductive layer, with the exception of the attachment area on a preferably electrically conductive reflector.

8. Antenna according to claim 1, characterized in that the antenna element arrangement, including its balancing device, is electrically conductive, and the reflector or the substrate on which the antenna element arrangement and/or its balancing device are/is mounted is non-conductive at least in the mounting and supporting area.

9. Antenna according to claim 1, characterized in that the reflector or the substrate has a board structure, on whose rearward face, which faces away from the antenna element arrangement, a matching structure is preferably provided.

10. Antenna according to claim 1, characterized in that the cap is designed as a plug-in and/or rotary connection attachment device, which can be mechanically fixed to the reflector by insertion and rotation.